Roller-bearing for sheaves of tackle-blocks



Patented Nov. l5, |898.

H. v. HARTZ. ROLLER BEARING FOR SHEVES 0F TACKLE BLOCKS.

' (Application fld Apr. 13, 1898.)

(No Model.)

ATTE-5T .HTTY I UNITED y STATES PATENT OFFICE,

HENRY V. HARTZ, OF CLEVELAND, OHIO.

ROLLER-BEARING FOR SHEAVES OF TAGK'LE-BLOCKS.

SPECIFICATION forming part of Letters Patent No. 614,248, dated November 15, 1898.

Appucaionieaaprnls,189s. saranno. 677,427. (Nomea.)

T0 ali whom it muy concern.

Be it known that LHENEY V. HARTZ, a citizen of the United States, residing at Cleveland, in the county ofA Cuyahoga andlState of Ohio, have invented certain new and useful Improvements in Roller-Bearings for Sheaves of Tackle-Blocks and the Like; and I do declare that the following is a full, clear, and exact description of the invention,which will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to roller-bearings for sheaves oftackle-blocks and the like; and the object of the invention-is to provide such sheaves with a simple, inexpensive, and durable antifriction-bearing so constructed Vas to require very little handwork in its production.

In the accompanying drawings, Figure 1 isv a side elevation of a sheave provided with my improved roller-bearing. y Fig. 2 is a central sectional elevation of the same, taken on line 2 2, Fig. 3. Fig. 3 is a cross-section on line 3 3, Fig. l. Fig; 4is a detail perspectiveview of the segments of the retaining-strap. Fig. 5 is a side elevation of the segments as attached to the retaining-strap, and Fig'. 6 is a cross-section thereof. Fig. 7 is a detail view of one of the rollers.

A represents the sheave proper, and B the shaft upon which it is supported by means of the interposed series ofv rollers C. These rollers are of the constructionseen in elevation, Fig. 7, having a central annular recess c, forming an engaging portion, as hereinafter described, and are conned within the central opening of the sheave, so as to bear on the circular surface 2 thereof and upon the shaft B, and they practically fill all the intervening space between said parts. Said rollers are held operatively in this relation by the retaining plate or carrier D, which is of a spider-like outline, and the segments 4, which lie in the central -annular groove or channel 5 in the sheave and constitute the immediate supports for said carrier. The said segments 4 are so freely or loosely confined in the groove 5 that they are free to travel around within the same, and the said retaining carrier or plate D has arms or proj ections 6 at intervals about its edge, through allel line with each other.

whichv it is fastened to the segments 4 by means of the right-angled `projections 7 and the inwardly-extending lugs 8 thereon,which match and fit into corresponding holes inthe 4`face of the arms 6 of the retaining plate or carrier D and over which said lugs are riveted to lock said parts together. One side of the arms 6 have recessed faces, which permit the lugs 8 to fit therein and which brings the faces of. the plate D and segments 4 in par- Each roller C being annularly grooved or channeled midway between its ends at c, as before described, the said groove is made of such diameter as to freely fit in the pockets 9 between the arms 6 of the carrier D. It will thus be seen that when a roller C is inserted between a set of arms 6 the said roller cannot be removed from that position and must remain in place and have only a rotary and radial play.

Now to the end that carrier D shall be retained in position within the sheave A the segments 4 are first placed in the, groove 5, and the carrier D, with its load of rollers, is then inserted into the sheave A, and lugs 8 on the segments 4 enter their corresponding openings in the said retaining plate or carrier D', where they are then riveted together, as before described. The retaining plate or carrier D and the segments 4 are of cast metal, and no handwork is required to produce them up for actual use, thus making a cheap but durable construction. The assembling and fastening of the parts is easily and quickly accomplished, and when the parts are in working position la most eflicient as well as a very cheap roller-bearin g is obtained.

1. A sheave having an inner circular opening with a channel in the interior thereof, in combination with a series of rollers, a retaining plate for said rollers and segments to which said plate is attached and constructed to travel in said channel, substantially as described. A A

2. In roller-bearings for sheaves, the combination of a series of rollers and a retainingplate therefor engaging the rollers between their ends, and segments for said plate having projections to fasten the plate and segments together, substantially as described.

IOO

caused to travel together, substantially as Io described.

fitness my hand to'the foregoing specilication this 30th day of March, 1898.

HENRY V. HARTZ.'

lVitnesses:

H. E. MUDRA, R. B. MOSER. 

